Question

a river is 6m deep and 70m wide is flowing at the rate of 2 km per hour.How much water will fall into the sea in a minute??

Answer 1

Area of cross section of the river = 6× 70 = 420 m2.
Rate of water flow = 2km/h = (2000/60) m/min
Volume of water flowing through this cross-section in every minute = Area × Rate
= (420)×(2000/60) = 14000 m3 = 14000×106 cc = 140,00,000 Litres